drivers/reset/sti-reset.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
11 #include <reset-uclass.h>
14 #include <dt-bindings/reset/stih407-resets.h>
48  * @wait_for_ack: The controller will wait for reset assert and de-assert to
62 /* STiH407 Peripheral powerdown definitions. */
63 static const char stih407_core[] = "st,stih407-core-syscfg";
64 static const char stih407_sbc_reg[] = "st,stih407-sbc-reg-syscfg";
65 static const char stih407_lpm[] = "st,stih407-lpm-syscfg";
95 /* Powerdown requests control 0 */
98 /* Powerdown requests control 1 (High Speed Links) */
102 /* Ethernet powerdown/status/reset */
200 	node = fdt_node_offset_by_compatible(gd->fdt_blob, -1,  in sti_reset_get_regmap()
216 		pr_err("unable to get regmap for %s\n", syscon->name);  in sti_reset_get_regmap()
217 		return -ENODEV;  in sti_reset_get_regmap()
220 	return regmap->ranges[0].start;  in sti_reset_get_regmap()
225 	struct udevice *dev = reset_ctl->dev;  in sti_reset_program_hw()
227 		(struct syscfg_reset_controller_data *)(dev->driver_data);  in sti_reset_program_hw()
230 	u32 ctrl_val = reset_desc->active_low ? !assert : !!assert;  in sti_reset_program_hw()
234 	if (reset_ctl->id >= reset_desc->nr_channels)  in sti_reset_program_hw()
235 		return -EINVAL;  in sti_reset_program_hw()
238 	base = sti_reset_get_regmap(reset_desc->channels[reset_ctl->id].compatible);  in sti_reset_program_hw()
240 	ch = &reset_desc->channels[reset_ctl->id];  in sti_reset_program_hw()
244 		ch->deassert_cnt++;  in sti_reset_program_hw()
245 		if (ch->deassert_cnt > 1)  in sti_reset_program_hw()
248 		if (ch->deassert_cnt > 0) {  in sti_reset_program_hw()
249 			ch->deassert_cnt--;  in sti_reset_program_hw()
250 			if (ch->deassert_cnt > 0)  in sti_reset_program_hw()
254 			      reset_ctl, reset_ctl->dev, reset_ctl->id);  in sti_reset_program_hw()
257 	reg = (void __iomem *)base + ch->reset_offset;  in sti_reset_program_hw()
260 		generic_set_bit(ch->reset_bit, reg);  in sti_reset_program_hw()
262 		generic_clear_bit(ch->reset_bit, reg);  in sti_reset_program_hw()
264 	if (!reset_desc->wait_for_ack)  in sti_reset_program_hw()
267 	reg = (void __iomem *)base + ch->ack_offset;  in sti_reset_program_hw()
268 	if (wait_for_bit_le32(reg, BIT(ch->ack_bit), ctrl_val,  in sti_reset_program_hw()
271 		      reset_ctl, reset_ctl->dev, reset_ctl->id);  in sti_reset_program_hw()
273 		return -ETIMEDOUT;  in sti_reset_program_hw()
310 	priv->data = (void *)dev_get_driver_data(dev);  in sti_reset_probe()
317 		.compatible = "st,stih407-picophyreset",
321 		.compatible = "st,stih407-powerdown",
325 		.compatible = "st,stih407-softreset",